Cheyenne Bird Banter – About birds and birding in Southeast Wyoming
Peregrine falcon - Wikipedia
Rooster crow hi-res stock photography and images - Alamy
Ravens vs Peregrine Falcon
The 5 Types of Falcons That Live in Alberta! (2023) - Bird Watching HQ
The 5 Types of Falcons That Live in Alberta! (2023) - Bird Watching HQ
The Birds of Washington (Volume 1 of 2), by William Leon Dawson
Alta. couple stokes passion for peregrine falcons
Duck hawk articles - Encyclopedia of Life
Trumpeter Swan The PhotoNaturalist